What is the difference between confidence and confident? And how to use it in a sentence? So let's pay attention. Ans: Confidence, is a noun, that means the feeling of your ability or trust in someone. Confident, an adjective, means being sure of sure of someone/yourself, your plans.. Example: 1. He wasn't a tall man, but he walked with the confidence of one. 2. The big question was, would her confidence last 3, Their confidence in him would fall further 4. I'm confident about my ability to do the job 5. Tom doesn't look very confident